Q.Draw static V-I characteristics of TRIAC.
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A symmetric bidirectional curve — mirror-image break-over at and — with higher gate current lowering the break-over voltage in both quadrants.
The static V-I characteristic of a TRIAC is drawn with current on the vertical axis and voltage on the horizontal axis, origin at the centre. Since a TRIAC is functionally two thyristors connected in anti-parallel, the curve is symmetric about the origin. In the first quadrant (MT2 positive) it stays in a low-current blocking state until the forward break-over voltage , then switches to conduction; the third quadrant (MT2 negative) is a mirror image with break-over at . A family of curves $I_{g3} > …
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